【发布时间】：2021-02-01 15:13:28
【问题描述】：
我创建了一个测验应用程序，它会跟踪用户的分数，直到用户完成。有一个 if 语句 - 当它到达测验结束时，会弹出一个结果视图控制器。我的问题是我想在 resultsViewContoller 的末尾获得相同的分数值。我已经通过 segue 连接了它，并且已经放置了标识符。 应用程序运行，但当我走到尽头时，segue 打开页面但分数没有改变？
我该如何解决这个问题？
用户完成应用。我调用 segue 方法，屏幕出现了。
结果视图控制器
import UIKit
class ResultsViewController: UIViewController {
var fruitness = Fruitness()
@IBOutlet weak var finalScoreLabel: UILabel!
var finalScore: String!
override func prepare(for: UIStoryboardSegue, sender: Any?) {
func viewWillAppear(_ animated: Bool) {
finalScoreLabel.text = finalScore
if finalScore != nil {
finalScoreLabel.text = "FINALSCORE:\(String(describing: Int(finalScore!)))"
}
}
}
}
游戏视图控制器
import UIKit
class GameViewController: UIViewController {
@IBOutlet weak var progressBar: UIProgressView!
@IBOutlet private weak var fruitLabel: UILabel!
@IBOutlet private weak var scoreLabel: UILabel!
@IBOutlet weak var replayGame: UIButton!
@IBOutlet weak var optionButton0: UIButton!
@IBOutlet weak var optionButton1: UIButton!
@IBOutlet weak var optionButton2: UIButton!
@IBOutlet weak var optionButton3: UIButton!
@IBOutlet weak var optionButton4: UIButton!
@IBOutlet weak var optionButton5: UIButton!
@IBOutlet weak var optionButton6: UIButton!
@IBOutlet weak var optionButton7: UIButton!
@IBOutlet weak var optionButton8: UIButton!
@IBOutlet private var fruitButtons: [UIButton]!
var score = 0
var fruitness = Fruitness()
override func viewDidLoad() {
super.viewDidLoad()
updateUI()
}
@IBAction func replayGame(_ sender: UIButton) {
fruitness.restartGame() //Calling restart
updateUI()
}
@IBAction func touchButton(_ sender: UIButton) {
let userAnswer = sender.currentTitle!
//The userGotItRight is = to the checkAnswer function which goes through the fruitOptions array to make sure the answer is corrct. T/F
let userGotItRight = checkAnswer(userAnswer: userAnswer)
if userGotItRight {
//Depending if the user got the answer correct the button turns green/red
sender.backgroundColor = UIColor.green
} else {
sender.backgroundColor = UIColor.red
}
nextFruit() //Calling the next Fruit untill all the fruit items have been displayed.
//This timer is responsible for the UIColors green, red and clear. Without this timer the color drags onto the next fruit.
Timer.scheduledTimer(timeInterval: 0.2, target: self, selector: #selector(updateUI), userInfo:nil, repeats: false)
}
// This check answer method needs an input to work. The input is the answer the user-choose (String).
func checkAnswer(userAnswer: String) -> Bool {
// Checks if the user got the answer correct. T/F
if userAnswer == fruitness.fruitOptions[fruitness.fruitNumber].fruit {
fruitness.score += 1 //We increase the value of score when we get the answer right.
// fruitness.finalScorez = fruitness.score
return true
} else {
return false
}
}
//Checks to make sure the eveytime it hits 0 it will shuffle.
func nextFruit() {
if fruitness.fruitNumber == 0 {
fruitness.fruitOptions.shuffle()
}
// print(fruitness.fruitOptions[fruitness.fruitNumber]) //Only gets printed in the consol
if fruitness.fruitNumber + 1 < fruitness.fruitOptions.count {
fruitness.fruitNumber += 1
} else {
self.performSegue(withIdentifier: "goToResultsVC", sender: self) //To call Segue
}
}
//Connecting and controlling oF the Segue and from GameView COntroller -> Results view controller.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToResultsVC" {
let destinationVC = segue.destination as! ResultsViewController
destinationVC.finalScore = scoreLabel.text //Printing the final score at the end.
}
}
@objc func updateUI() {
//Controlls the background. Clearing ability between T/F answers.
optionButton0.backgroundColor = UIColor.clear
optionButton1.backgroundColor = UIColor.clear
optionButton2.backgroundColor = UIColor.clear
optionButton3.backgroundColor = UIColor.clear
optionButton4.backgroundColor = UIColor.clear
optionButton5.backgroundColor = UIColor.clear
optionButton6.backgroundColor = UIColor.clear
optionButton7.backgroundColor = UIColor.clear
optionButton8.backgroundColor = UIColor.clear
//The fruit name available that the user needs to match.
fruitLabel.text = fruitness.getFruitText()
//Displaying the progress of the user till they reach the end.
progressBar.progress = fruitness.getProgress()
//Displaying the score at all times
scoreLabel.text = "SCORE: \(fruitness.score)"
}
}
【问题讨论】：
标签： ios swift xcode uiviewcontroller segue